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Precision forging: Any forging process that produces parts to closer tolerances than conventional forging processes.
The comparison between precision forging and investment cast
Casting cannot obtain the strengthening effects of hot and cold working. Forging surpasses casting in predictable strength properties - producing superior strength that is assured, part to part.
- Defects refined in preworking.
A casting has neither grain flow nor directional strength and the process cannot prevent formation of certain metallurgical defects. Preworking forge stock produces a grain flow oriented in directions requiring maximum strength. Dendritic structures, alloy segregations and like imperfections are refined in forging.
Casting defects occur in a variety of forms. Because hot working refines grain pattern and imparts high strength, ductility and resistance properties, forged products are more reliable. And they are manufactured without the added costs for tighter process controls and inspection that are required for casting.
- Response to heat treatment
Castings require close control of melting and cooling processes because alloy segregation may occur. This results in non-uniform heat-treatment response that can affect straightness of finished parts. Forgings respond more predictably to heat treatment and offer better dimensional stability.
Some castings, such as special performance castings, require expensive materials and process controls, and longer lead times. Open-die and ring rolling are examples of forging processes that adapt to various production run lengths and enable shortened lead times.
Roller Hook for Food industry:
Material : 17-4PH (AISI630)
Weight: 1.4kg
Working Load Limit: 600kg
Proof Load: 2.4 ton
Breaking Load: >4.8ton
Manufacturing process: Forged and heat treatment
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